package com.pactera.integral.security;

import java.util.Collection;
import java.util.Iterator;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.util.CollectionUtils;

public class MyAccessDecisionManager implements AccessDecisionManager {

    public final String DEFAULT_DENIED_MESSAGE = "Access Denied";
    @Override
    public void decide(Authentication authentication, Object object, Collection<ConfigAttribute> configAttributes)
            throws AccessDeniedException, InsufficientAuthenticationException {
        if (CollectionUtils.isEmpty(configAttributes)) {
            throw new AccessDeniedException(DEFAULT_DENIED_MESSAGE);
        }
        Iterator<ConfigAttribute> ite = configAttributes.iterator();
        while (ite.hasNext()) {
            ConfigAttribute ca = ite.next();
            String needRole = ((org.springframework.security.access.SecurityConfig) ca).getAttribute();
            for (GrantedAuthority ga : authentication.getAuthorities()) {
                if (ga.getAuthority().equals(needRole)) {
                    return;
                }
            }
        }
        throw new AccessDeniedException(DEFAULT_DENIED_MESSAGE);
    }

    @Override
    public boolean supports(ConfigAttribute attribute) {
        return true;
    }

    @Override
    public boolean supports(Class<?> clazz) {
        return true;
    }
}
